一道關於 Doppler effect - moving reflector 的問題: 一個沒有移動的聲音發射器,它同時也是聲音接收器 (以下稱 為 E) 向一道以速度 v 向其移近的牆 (以下稱為 W) 發出頻 率為 f 的聲音.問題是 E 收到經 W 反射的聲音頻率為多少? 靜止 E f f' = ? W v Doppler effect – Moving reflector P....
With this effect, the index of refraction of the Earth crust may accomplish a refractive effect bywhich the neutrino velocity through the Earth crust turns out to be small in relation to the speed of light in the empty space, leading to an encrusted discrepancy that may have contamined the...
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3.1.1. Effect of observation-window on variance of mean velocity estimates The observation-window directly influences the spatial resolution of PW Doppler when applied for LWD as explained in Section2.3. It is therefore desirable to have small observation-windows. However, the observation-window also...
The Doppler frequency shift almost has no effect on satellite communications. Since the height of the satellite makes the coverage very broad, almost no handover is needed. However, blind spots exist in its coverage area where there are tall city buildings, rugged mountains, and tunnels. In ...
www.nature.com/scientificreports OPEN Doppler effect induced spin relaxation boom received: 25 September 2015 accepted: 29 February 2016 Published: 21 March 2016 Xinyu Zhao1, Peihao Huang1,2,3 & Xuedong Hu1 We study an electron spin qubit confined in a moving quantum dot (QD), with...
Doppler effect with dilation or compression rather than with frequency shift as in the narrow-band approximation. The Q distributions, a modified W-V representation that is related to the wide-band ambiguity function by an integral transform, is defined. A spectrogram constructed with proportional-...
专利名称:Device for compensating the Doppler effect produced by the relative motion between receiver and transmitter, tuned at the same frequency, in a radioreceiver 发明人:BRUAS, PATRICK,PRIGENT, JEAN-PAUL 申请号:EP 874 02956.4 申请日:19871222 公开号:EP 0274 958A1 公开日:19880720 专利附图: ...
To eliminate the above-described problems, Japanese Patent Application Laid-open No. 2-262064 proposes a laser doppler velocimeter employing a diffraction grating. In this velocimeter, laser light emitted from a laser strikes a diffraction grating, and the two ray bundles of the orders +n and -...
Significant problems in this regard may occasionally occur, however. The invention described herein could provide a warning to the operator that uniform insonification of the aorta and/or uniform scattering are not occurring. If, for instance, the operator was ultimately unable to achieve equalization...